On your way to lvl 90, there are 2 starter dungeons to do, and 2 more at lvl 87.

Stormstout Brewery (levels 85 to 90)
Temple of the Jade Serpent (levels 85 to 90)
Mogu’shan Palace (levels 87 to 90)
Shado-Pan Monastery (levels 87 to 90)